[Imports] RFC: LA County building import (Los Angeles, California, USA)

[Christoph Hormann]

On Thursday 24 March 2016, maning sambale wrote:
>
> > - Tagging still looks vague.  What you have on
> > https://github.com/osmlab/labuildings/blob/master/README.md is just
> > a list of OSM keys to use but there is no information on the values
> > -
>
> Right, I updated the wiki to describe the tags.  Still a work in
> progress, but see here:
> https://wiki.openstreetmap.org/wiki/Los_angeles,_California/Buildings
>_Import#Data_Preparation

Thanks, this clarifies things a lot and mostly looks good.

Regarding tagging plans please consider that building=farm is 
exclusively for residential building on a farm, not for other buildings 
with farming related use.

> The initial offset we saw was due to re-projection issues from NAD83
> to WGS84 datum.  By using a custom projection parameters the
> difference is very minimal difference (10 micrometer precision
> range). Reprojection is now step is now added in the wiki.

OK. I was also concerned about vertical datum (i.e. reference geoid) for 
elevation values and feet vs. meters for ele and height.

-- 
Christoph Hormann
http://www.imagico.de/